Journal Article

PreJuSER-17344

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Highly Efficient Separation of Actinides from Lanthanides by a Phenantrholine-Derived Bis-Triazine Ligand

Lewis, F. W. ; Harwood, L. M. ; Hudson, M. J. ; Drew, M. G. B. ; Desreux, J. F. ; Vidick, G. ; Bouslimani, N. ; Modolo, G.FZJ* ; Wilden, A.FZJ* ; Sypula, M.FZJ* ; Vu, T.-H. ; Simonin, J.-P.

2011
American Chemical Society Washington, DC

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Please use a persistent id in citations: doi:10.1021/ja203378m

Abstract: The synthesis, lanthanide complexation, and solvent extraction of actinide(III) and lanthanide(III) radiotracers from nitric acid solutions by a phenanthroline-derived quadridentate bis-triazine ligand are described. The ligand separates Am(III) and Cm(III) from the lanthanides with remarkably high efficiency, high selectivity, and fast extraction kinetics compared to its 2,2'-bipyridine counterpart. Structures of the 1:2 bis-complexes of the ligand with Eu(III) and Yb(III) were elucidated by X-ray crystallography and force field calculations, respectively. The Eu(III) bis-complex is the first 1:2 bis-complex of a quadridentate bis-triazine ligand to be characterized by crystallography. The faster rates of extraction were verified by kinetics measurements using the rotating membrane cell technique in several diluents. The improved kinetics of metal ion extraction are related to the higher surface activity of the ligand at the phase interface. The improvement in the ligand's properties on replacing the bipyridine unit with a phenanthroline unit far exceeds what was anticipated based on ligand design alone.

Keyword(s): J

Note: We thank the Nuclear Fission Safety Program of the European Union for support under the ACSEPT (FP7-CP-2007-211 267) contract. We also thank the EPSRC and the University of Reading for funds for the X-Calibur system. Use of the Chemical Analysis Facility at the University of Reading is gratefully acknowledged.

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Contributing Institute(s):

1. Sicherheitsforschung und Reaktortechnik (IEK-6)

Research Program(s):

1. Nukleare Sicherheitsforschung (P14)
2. ACSEPT - Actinide reCycling by SEParation and Transmutation (211267) (211267)

Appears in the scientific report 2011

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